This kind of cold rolled steel sheet uses common carbon structural steel hot-rolled steel strip as raw material, then further cold-rolled into a steel plate with a thickness of less than 4mm. Because it is rolled at normal temperature, thus there is no iron oxide scale is produced, its surface quality is good and its dimensional accuracy is high as well. In addition, the cold rolled steel sheet has the advantages of high quality, long service life, exquisite workmanship, wear resistance, corrosion resistance, impact resistance, reasonable price and excellent mechanical properties. It is widely used in automobiles, refrigerators, washing machines and other home appliances, as well as industrial equipment and various building materials. The cold rolled steel sheet receives a good reputation among customers due to high quality and excellent performance.